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Proceedings Paper

Raman spectroscopic sensing using whispering gallery microresonators
Author(s): Perry Edwards; Corey Janisch; Bo Peng; Sahin Kaya Ozdemir; Lan Yang; Zhiwen Liu
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Paper Abstract

We investigate Raman spectroscopic sensing using whispering gallery microresonators as a label-free method toward single particle detection. Whispering gallery mode microresonators are used as platforms to perform sensitive particle detection by exploiting the strong, evanescent field of a resonant mode exposed on the surface of the microresonator. Particles adhered to the microresonator surface interact with the field and scatter photons circulating within the resonator. In particular, Raman scattered photons are detected, providing molecular-specific "fingerprint" information regarding the adhered particles. The exploitation of a resonant mode allows for enhancement of generated Raman signal over traditional methods of spontaneous Raman scattering. Preliminary proof-of-concept experimental results are shown.

Paper Details

Date Published: 28 September 2013
PDF: 7 pages
Proc. SPIE 8845, Ultrafast Imaging and Spectroscopy, 884512 (28 September 2013); doi: 10.1117/12.2024707
Show Author Affiliations
Perry Edwards, The Pennsylvania State Univ. (United States)
Corey Janisch, The Pennsylvania State Univ. (United States)
Bo Peng, Washington Univ. (United States)
Sahin Kaya Ozdemir, Washington Univ. (United States)
Lan Yang, Washington Univ. (United States)
Zhiwen Liu, The Pennsylvania State Univ. (United States)

Published in SPIE Proceedings Vol. 8845:
Ultrafast Imaging and Spectroscopy
Zhiwen Liu, Editor(s)

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